Call For Paper Volume:4 Issue:6 Jun'2017

Identification and modelling of Air Separation Unit for extraction of Oxygen using SystemIdentification Techniques

Publication Date : 23/02/2016



Author(s) :

Professor P A Nageswara Rao , Professor P Mallikarjuna Rao.


Volume/Issue :
Volume 3
,
Issue 2
(02 - 2016)



Abstract :

Visakhapatnam steel plant (VSP) is one of the most modernized steel plants in the world. The plant is equipped with number of new technologies like large-scale industrial computerization and automation, latest instrumentation etc. It produces better profits, only if the plant is operated at international levels of efficiency and productivity. Earlier, the Air Separation Plant (ASP) at VSP is automated using relay logic system.Subsequently they are replaced with Programmable Relay Logic Controllers (PLC’s). In industries where large machinery is used, engineers have found it very difficult to analyse the problems associated with the working of a nonlinear time invariant system which have huge time lags in the process and nonlinearity makes it difficult to analyse the system’s controllability and stability. Hence, many of the new projects are carried out on the latest instrumentation technology to employ Distributed Control System (DCS). Advancements in the field of digital signal processing opens many other features for optimized process control. These digital systems are highly reliable and it takes low down time for maintenance or trouble shooting. So in today’s environment there is a strong need to go to the DCS for all the industries to get the reliable information, effective control for the long un-interruptible, efficient operation of the equipment.Therefore to build a DCS, the system is to be Identified and modelled first. Hence the main objective of the work is to identify and model the distillation column of Air Separation Unit (ASU) in ASP. In this work an attempt is made to identify and model the ASU system using Box – Jenkins, ARMAX and Subspace Identification methods.


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Identification and modelling of Air Separation Unit for extraction of Oxygen using SystemIdentification Techniques

February 16, 2016